Question

A triangular park ABC has sides 120m, 80m and 50m. A gardener Dhania has to put a fence all around it and also plant grass inside. How much area does she need to plant?A triangular park ABC has sides 120m, 80m and 50m. A gardener Dhania has to put a fence all around it and also plant grass inside. How much area does she need to plant?​

Answer 1

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Here, 

a = 120m,

b = 80m,

c = 50m

and, s = a+b+c / 2

= 250/2 = 125

Area she need to plant grass :-

=√s(s−a)(s−b)(s−c)

= 125(125−120)(125−80)(125−50)

= 37515m²

Cost of fencing :-

= [(a+b+c)−3].20

= [250−3].20

= Rs4940

Answer 2

Answer:

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